title: Calcium and calciferol antagonise effect of verapamil in atrial fibrillation.
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000188:drug therapy*; D002118:Calcium / Q000494:pharmacology*; D004872:Ergocalciferols / Q000494:pharmacology*; D006801:Humans; D008297:Male; D014700:Verapamil / Q000037:antagonists & inhibitors* / Q000627:therapeutic use
chemical_list: D004872:Ergocalciferols; D014700:Verapamil; D002118:Calcium